MEC 325 Study Guide - Final Guide: Bursitis, Anthropometry, Diffuse Reflection
3 May 2018
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Types of Requirements:
1) Product Characteristic: described what thing has TO BE …. ofortale, affordale, futioal
2) Functional Characteristic: describes what thing has TO DO …. Moe, aoodate pppl
3) Constraint- HOW It does thigs … ie. “afely
PROBLEM ANALYSIS: Usage scenario: Cycle of usage of product: to identify problems with product and
human interactions with it; evaluate if product meets requirements.
Ie. Problematic spatial designs dynamic interactions (relation when things in motion): location wrt
other things
Chapter 1
MODEL OF HUMAN-DESIGN INTERACTIVE CYLCE
- Humans have limitations
- Designers create disabilities
Types of problem with design:
1) Sensory can u see
2) Motor can u move/ resist mobility
3) Cognitive do u understand wat to do
LEAD to REQUIREMENTS: cognitive demands, motor skills required
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Human-Machine interface diagram
- Channels of communication: touch, smell, hear, see, taste
Product lifecycle: User-groups:
1) Users/co-users
2) Shipping and transport
3) Sales
4) Manufacturing and assembly
5) Installation
6) Decommissioning personnel
To improve productivity- improve performance affordances ( how u interact w users) ie controls,
displays --- ensures reliability
Design loop – design is never ending
CHAPTER 2: Cost-Benefit
- Trade-offs on percentage of incidents due to bad design to cost to recall device
- USABILITY TESTS EARLY IN DEVELOPMENT-> avoid recalls, warranty claims.. etc
Argue why HF is beneficial:
1) Less training involved later on because product can be made easier to assemble and use; easier
interface to handle
2) Less likely to have user accidents due to increase in considerations of human use
3) Less warranty claims will be made due to defects being considered prior to the product going
onto the market
4) Discovering mistakes early, saves money down the road because fixing a mistake after more
manufacturing and design process has been done is more costly
5) Increases company reputation as they are viewed as a company that considers how their users
will interact with the product
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6) Increase customer satisfaction, the more user friendly the product is, the more happy customers
will be with the product--- instills confidence in customer—thought abt details
7) Increases sales and revenue due to customer satisfaction increasing and accommodating more
people
8) Increases value, customers more willing to pay for a product that accommodates more people
and is easier to use
9) Better product- cost and quality + reliability
10) May reduce costs due to considering how sizes and weight can be reduced-> utilizing hollow
tubing instead of solid bars to reduce weight
11) Decreased development time and costs because of usability errors identified early on
12) Decreased maintenance costs
13) Improved user productivity
14) Reduced personnel costs
15) May lower environmental costs
Ergonomic Improvements
1. Illumination-see imperfections and quality defects- adequate for inspection work
Uniform illumination level at 1000 lux
2. Installation of special lighting for inspection
3. Job rotation and reduced time overlap btwn shifts for monotonous jobs
Keep attention t/o work shift
4. Personal music was distracting and was discontinued
5. Ergonomic chairs certified for clean rooms
6. Improved communication
7. Materials-handling guidelines
8. Automation of monotonous jobs
9. Metric to decimal conversion charts
10. Housekeeping improved
11. Noise reduction
12. Ergonomics training
13. Continuous flow manufacturing
14. Use of protective gloves
Anthropometry in Workstation Design
- deals w accommodating ppl of diff body size & accessibility to controls
- reduces fatigue, injury and increase productivity
- Differences btwn gender, genetics and cultures
- the 5th, 50th, and 95th percentile measures
- design for 5-95
- the greater the design range, the greater the cost..ie don’t do 0-95
- Let the small person reach, let the largest person fit.
CHAPTER 3 – HF STUDIES AND INVESTIGATION
-EXAMPLE: Given scenario; you want to find out how easy it is to use this product, how will you find out
the data about the ASSEMBLY: (SOURCES OF INFO)
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Document Summary
Types of requirements: product characteristic: described what thing has to be . (cid:272)o(cid:373)forta(cid:271)le, afforda(cid:271)le, fu(cid:374)(cid:272)tio(cid:374)al, functional characteristic: describes what thing has to do . Mo(cid:448)e, a(cid:272)(cid:272)o(cid:373)(cid:373)odate pppl: constraint- how it does thi(cid:374)gs ie. afely. Problem analysis: usage scenario: cycle of usage of product: to identify problems with product and human interactions with it; evaluate if product meets requirements. Problematic spatial designs dynamic interactions (relation when things in motion): location wrt other things. Types of problem with design: sensory can u see, motor can u move/ resist mobility, cognitive do u understand wat to do. Lead to requirements: cognitive demands, motor skills required. Channels of communication: touch, smell, hear, see, taste. Product lifecycle: user-groups: users/co-users, shipping and transport, sales, manufacturing and assembly, installation, decommissioning personnel. To improve productivity- improve performance affordances ( how u interact w users) ie controls, displays --- ensures reliability. Trade-offs on percentage of incidents due to bad design to cost to recall device.
